powell



similar number of cog wheels of dierent UNrTEn sTATEs PATENT oEEroE JNO.B. POWELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND G. B.

FRICK, OF SAME PLACE.

AUTOMATIC FAN.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, JOHN B. POWELL, of the city and county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulImprovement in Automatic Fans; and I do hereby declare the following tobe a full, clear, and exact description of the same, reference being hadto the accompanying drawing and to the letters of reference markedthereon.

My invention consists in a spindle with any convenient number of cogwheels of diii'erent diameters, in combination with a diameters on aspindle, with a crank connected to the vane of the fan the first spindlebeing rendered adjustable and applied to and combined with the works ofan automatic fan substantially in the manner described hereafter so thatthe vane of the fan may be agitated by a faster or slower speed atpleasure by the adjustment of the said spindle.

In order to enable others to make and use my invention I will nowproceed to describe its construction and operation.

On reference to the accompanying drawing which forms a part of thisspecification, Figure l is a front view of an automatic fan with myimprovements. Fig. 2 a side view. Fig. 3, a detached view of the changegear.

Similar letters refer to similar parts throughout the several views.

A is a stand which may be constructed in the manner illustrated or inany other form which the situation occupied by the fan suggests as themost appropriate. To a platform a on this stand are secured the twoplates B and B in which turns the spindle C, operated by a coiled springD, a wheel E, on this spindle gearing into a pinion F on the spindle G,which has a wheel H gearing into a pinion I on the spindle J, the latterhaving a wheel K, gearing into a pinion L, on the spindle M. The latterspindle has a iiy wheel Q and two cog wheels N and P, the former-beinglarger in diameter than the latter. A slight longitudinal movement isallowed to the spindle M in its bearings in the plates B and B', thelongitudinal motion of the spindle being controlled by the lever It,which has its fulcrum on a stud z' 25,368, dated September 6, 1859.

on the plate B, the point of the lever fitting between two collars j, onthe spindle so that the latter may be moved backward and forward by themovement of the lever.

Above the spindle M is another spindle S turning in the plates B and B',and furnished with two cog wheels T and U, the former being arranged togear into the cog wheel N and the wheel U to gear into the cog-wheel P,both sets of wheels however are never in gear at the same time, but byoperating the lever R the wheel P may be thrown into gear with the wheelU, or the wheel N into gear with the wheel T at pleasure. On the end ofthe spindle S is a crank m the pin of which is connected by a rod n toan arm p on the spindle g which vibrates in hangers t secured to an arm/v projecting from the frame, the vane W of the fan being secured tothis spindle g.

The spring being wound up motion will be communicated by the train ofwheels above described, to the fly wheel shaft M, and either through thewheels N and T, or the wheels P and U, (if the latter pair instead ofthe former be arranged to gear into each other) to the spindles therevolution of which will impart through the crank 'm and connecting rodn a vibrating motion to the vane w. When a moderate agitation of the airby this vane is required the shaft M is slid by the lever R until thesmallest wheel P gears into the largest wheel U, as shown in Fig. l,when the speed of the spindle S will necessarily be less than that ofthe shaft M. When a more rapid agitation of the air is required thespindle N is slid out until the two last mentioned wheels are out ofgear with each other and until the larger wheel N on the spindle M gearsinto the smaller wheel T on the spindles S when the latter will revolvemore rapidly and communicate the required rapid motion to the vane W.

I wish it to be understood that I lay no claim to a fan operated byclock work or to the application of a balance wheel to the works of anautomatic fan; but that I limit my claim to and desire to procureLetters Patent for- The spindle M, with any convenient number of cogwheels of different sizes, in com- Wheels also of different sizes on thecrank name to this specification in the presence of bination with asimilar number of cog In testimony whereof I have signed my Spindle S,when the said spindle and its i two subscribing Witnesses.

Wheels are rendered adjustable, and are ap- JOHN B. POWELL. plied to,and combined With the Works Witnesses:

of an automatic fan substantially as and HENRY HoWsoN,

for the purpose herein set forth. CHARLES D. FREEMAN.

